body {
    background-color: #f4f4f4;
}

.main {
    background-color: #f4f4f4;
}

.kecheng-nav {
    padding: 15px 0;
}

.xiyu-video {
    width: 100%;
    height: 500px;
    background-color: #aaaaaa;
}

.video {
    width: 100%;
    height: 100%;
}

.xiyu-info {
    background-color: #ffffff;
    height: 503px;
}

.xiyu-kc-title {
    padding: 20px 24px 6px;
    border-bottom: 1px solid rgb(244, 245, 245);
}

.layui-colla-title {
    color: #999999;
}

.xiyu-kc-title h1 {
    font-size: 20px;
    font-weight: 600;
    color: rgb(34, 34, 34);
    line-height: 21px;
    margin-bottom: 8px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    word-break: break-all;
}

.xiyu-kc-title-sub span {
    display: inline-flex;
    -webkit-box-align: center;
    align-items: center;
    font-size: 12px;
    font-weight: 400;
    color: rgb(153, 153, 153);
    line-height: 18px;
    margin-right: 16px;
}

.xiyu-kc-mulu {
    height: 425px;
    overflow-y: scroll;
    overflow-x: hidden;
}

.layui-colla-title {
    height: 34px;
    line-height: 34px;
    display: flex;
    -webkit-box-pack: justify;
    justify-content: space-between;
    -webkit-box-align: center;
    align-items: center;
    cursor: pointer;
    font-size: 13px;
    margin-left: 0px;
    position: relative;
    background: rgb(244, 245, 245);
    user-select: none;
}

.mulu-item {
    /* height: 64px; */
    font-size: 13px;
    color: rgb(34, 34, 34);
    font-weight: 400;
    padding: 12px 19px;
    border-radius: 2px;
    user-select: none;
    cursor: pointer;
    position: relative;
}

.mulu-item::after {
    content: " ";
    position: absolute;
    bottom: 0px;
    left: 19px;
    width: 322px;
    height: 1px;
    background-color: rgb(244, 245, 245);
    border-radius: 2px;
}

.mulu-title {
    height: 16px;
    display: flex;
    -webkit-box-align: center;
    align-items: center;
    color: rgb(34, 34, 34);
    position: relative;
}

.mulu-title-t {
    display: inline-block;
    max-width: 282px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: 14px;
}

.mulu-title-sub {
    height: 16px;
    -webkit-box-align: center;
    align-items: center;
    position: relative;
    margin-top: 8px;
    display: flex;
}

.mulu-title-play {
    width: 16px;
    height: 16px;
    margin-left: 4px;
    display: none;
    background: url(/Public/common/img/course-playing.gif) center center / 100% 100%;
}

.mulu-item.cur .mulu-title-play {
    display: block;
}

.mulu-item.cur .mulu-title-t {
    color: rgb(26, 182, 106);
}

.mulu-item.lock .mulu-title-play {
    background: url() center center / 100% 100%;
}

.mulu-lock {
    width: 16px;
    height: 16px;
    margin-left: 10px;
    display: none;
    background: url() center top / 100% 100%;
}

.mulu-item.lock .mulu-lock {
    display: block;
}

.mulu-time {
    color: rgb(153, 153, 153);
    font-size: 12px;
}

.xiyu-share {
    height: 60px;
    line-height: 60px;
    border-top: 1px solid #f4f4f4;
    border-bottom: 1px solid #f4f4f4;
    background-color: #ffffff;
}

.xiyu-share-btn {
    display: inline-block;
    line-height: 60px;
    margin-left: 20px;
    color: rgb(102, 102, 102);
    vertical-align: middle;
}

.xiyu-share-btn:hover {
    color: rgb(255, 117, 54);
}

.xiyu-buy {
    width: 100%;
    height: 60px;
    background-color: #ffffff;
    text-align: center;
    border-top: 1px solid #f4f4f4;
    border-bottom: 1px solid #f4f4f4;
}

.xiyu-buy-btn {
    display: inline-block;
    background: linear-gradient(270deg, rgb(255, 117, 54) 0%, rgb(255, 134, 33) 100%);
    color: #ffffff;
    position: relative;
    width: calc(100% - 40px);
    height: 42px;
    line-height: 42px;
    margin-top: 9px;
    text-align: center;
    cursor: pointer;
    border-radius: 2px;
    font-size: 15px;
    -webkit-box-align: center;
    align-items: center;
    -webkit-box-pack: center;
    justify-content: center;
    flex-wrap: nowrap;
    flex-direction: row !important;
}

.xiyu-buy-btn:hover {
    color: #ffffff;
    background: linear-gradient(270deg, rgb(255, 130, 60) 0%, rgb(255, 155, 43) 100%);
}

.price {
    font-size: 18px;
    margin-right: 4px;
    font-weight: 500;
}

.delPrice {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    margin-right: 4px;
}

.desc {
    font-size: 16px;
    font-weight: 500;
}

.limit-time {
    position: absolute;
    color: rgb(95, 72, 24);
    right: -13px;
    top: -8px;
    line-height: 19.2px;
    font-size: 12px;
    transform: scale(0.83);
}

.limit-time>span {
    background: rgb(239, 210, 94);
    padding: 0.83px 5.63px;
    border-radius: 6px 6px 6px 0px;
}

.limit-time>span .cover {
    width: 15px;
    text-align: center;
    display: inline-block;
}

.xiyu-desc {
    background-color: #ffffff;
}

.xiyu-desc .layui-tab {
    padding: 0;
    margin: 0;
}

.xiyu-desc .layui-tab-title {
    height: 62px;
    line-height: 62px;
}

.xiyu-desc .layui-tab-title li {
    height: 62px;
    line-height: 62px;
    width: 120px;
    color: rgb(102, 102, 102);
    font-size: 16px;
}

.xiyu-desc .layui-tab-title .layui-this:after {
    display: none;
}

.xiyu-desc .layui-tab-title .layui-this {
    color: rgb(51, 51, 51);
    font-weight: bold;
    background: linear-gradient(360deg, rgb(234 139 88 / 0%) 0%, rgb(214 88 67 / 15%) 100%);
}

.xiyu-desc .layui-tab-title .layui-this::before {
    content: "";
    position: absolute;
    top: 0px;
    left: 0px;
    z-index: 1;
    display: block;
    width: 100%;
    height: 3px;
    background: rgb(255 74 81);
}

.xiyu-desc .layui-tab-title {
    border-color: #f4f4f4;
}

.xiyu-desc .layui-tab-content {
    padding: 0;
}

.xiyu-desc .layui-tab-item {
    min-height: 500px;
}

.xiyu-desc .layui-tab-item img {
    max-width: 100%;
}

.xiyu-box {
    background-color: #ffffff;
    padding: 24px 5px;
    background: rgb(255, 255, 255);
    margin-bottom: 16px;
    position: relative;
}

.xiyu-box-hd {
    width: 72px;
    height: 18px;
    font-size: 18px;
    font-weight: 400;
    color: rgb(34, 34, 34);
    line-height: 18px;
    position: relative;
    left: 16px;
}

.xiyu-box-hd::before {
    content: "";
    display: block;
    position: absolute;
    width: 6px;
    height: 18px;
    background: rgb(255 74 81);
    left: -21px;
    top: 0px;
}

.xiyu-box-bd {
    border-radius: 2px;
    margin-top: 16px;
    font-size: 15px;
    font-weight: 400;
    color: rgb(68, 68, 68);
    width: 100%;
}

.xiyu-box-help-item {
    height: 40px;
    line-height: 40px;
    display: block;
    cursor: pointer;
}

.xiyu-box-help-item:hover {
    color: rgb(255 74 81);
    background-color: #f8f8f8;
}

.xiyu-box-help-item span {
    display: inline-block;
    width: 18px;
    height: 15px;
    font-size: 15px;
    font-weight: 400;
    color: rgb(191, 191, 191);
    line-height: 15px;
    margin: 0px 10px 0px 19px;
    vertical-align: middle;
}

.xiyu-box-help-item:hover span {
    color: rgb(255 74 81);
}

.xiyu-box-help-item b {
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    display: inline-block;
    width: calc(100% - 50px);
    vertical-align: middle;
    font-weight: 400;
}

@media screen and (max-width: 768px) {
    .xiyu-video-box {
        height: 280px !important;
    }
    .xiyu-video {
        width: 100%;
        height: 280px;
        background-color: #aaaaaa;
    }
    .xiyu-info {
        height: auto;
    }
    .xiyu-kc-mulu {
        height: auto;
    }
}